Relay.



'E. MoGLINTOGK.

RELAY. APPLICATION FILED APR. 30, 1907. 923,874. Patented June 8, 1909.

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RELAY. I

. v APPLIUATION FILED APR. 30, 1907- 923,874, Patented June 8,1909.

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STATES PATENT OFFICE.

EDWARD n oLrN'rooK, or STQPAUL, MINNESOTA, ASSIGNOR ro McCLINTOCK MANUFACTURING COMPANY,OF ST. PAUL, MINNESOTA. I

RELAY.

To; all. wlwm it comm.

Be it known that I, E wmnMeons'Tbck,

' cuit is closed, and showing the means for' of St. Paul, Ramsey county, Minnespta, have invented certain new and useful Imprpve-- ments in Relays, of which the following is a specification; V

' In the operation of a steam railroad, long sections of the track rails on both sides may be insulated for use in connection with crossing and other signals. In an electric railroad, however, is not permissible, as one side of the track is used for the return current and cannotcontain insulated sections. Such sections, therefore, must be locatedon the same side of the track and are made comparatively short and the signal mechanisni must be put in operation While the car is passing over the sections. It is desirable that the signal be operated for a longer period of time than while the car is passing over the.insu latedr'ail, and the object'of my invention is to provide a'device by means of which the signal may be operated for a predetermined.

eriod of time afterthe car has left the insuated rail section or sections, the length of the period being determined by the circumstanoesand conditions surrounding each ap ,plication or installation of the devlce';

- I The invention consists generally in a relay position of the relay with the signal circuitopen. 3 is a similar view illustrating the position of the parts when the signal cirlockingthe relay armature and the circuit closers. Fig. 4 illustratesa modification in the device to adapt it for use on a normally closed circuit. Fig.5 illustrates the application of the device, with the motor mechanism omitted, to a 500 volt current such as is used on street railway lines, showing the position of the parts when the circuit is open through one of the rings. Fig. 6 is a similar view Specification of Letters Patent. g; mgr-am iiled April-so, 1907. sens K019371352.

' Patented June a, 1999.

par ;r n the drawings; 2 represents ;a suitable base, 3 a motor, 4 a relay 1n a track circuit 5,

- the devicesfor closing this circuit being omitillustrating ,ah thetposition bf the same I ted as they form no part of the present inveht1on. Aplate 6 is supported above thebase v 2 upona series of osts 7. A shaft/8 shpported in suitable earings 9 and is provided with a series of hollow rings of insulating ma: terial secured onsaid shaft and containing a quantity of mercury. I haveshown inthi's case two rings represented by numerals 10 and 10', but ianydesired number of these. rlngs may be provided.

" Contact polnts 11 and 12 project into the path of the mercury in the rlngs and are, con-- nected by'conductors 13 and 14 and 313'. and 14 through abattery B and a signal bell S to the motor'3. Severalof these circuitsr'n'a be provided, one for each contact he armature'15 of the relay is mounted at 16 and is connected by a link 17 with an arm 18 on the shaft 8 carrying a counter weight 19, which normally holds said armature away from the relay. Stop screws 20 are mounted I in a standard 21 on each side of the armatureand are capable of adjustment for the purpose of limitmg the stroke of the arma ture according to t e degree of oscillation desired of the circuit closing rings.

The shaft ofthe motor is provided with a worm 22 meshing with a worm gear 23 mounted on a worm shaft 24 that is arranged substantially at right angles to the motor shaft. A second worm gear 25 enga es the worm shaft 24 and is mounted on a s aft '26 parallel with the motor shaft. A ratchet 27 is secured on the shaft 26 and an arm 28 has one end adapted to engage the teeth of said ratchet and 1s pivotally connected at its opposite end to a lever 29 secured on the shaft 8. A suitable'guide 30 for the arm 28 is provided on one of the posts 7.

In operation, the circuit 5 being closed, the relay will be energized and its armature attracted, the shaft 8 rocked and the signalcircuits closed through the contact. oints in the hollow rings. The lever 29 will e swung toward the right with the rockin of the shaft 8 and the arm 28 slipping over 1; e teeth of the ratchet will be prevented thereby from returning to its normal position and allowing the counterweight to return the contact rings and the relayarmatures to their normal E the insulated section of the track.

position when the circuit is broken after the passage of the car overthe insulated rail section. The motor will be set in motion and revolved at a high speed and its movement transmitted through the reduction gearing constructed preferably in about the ratio of 10,000 to one, to revolve the ratchet 27 and allow the contact rings to return to their normal position. The operation of the ratchet will be very slow' and it will require a considerable period of time for the lever 29 to return to its normal position and the hollow rings to be revolved sufiicientlyto raise one of the contact points out of the mercury.

and during this time. the signal will be operated eventhough the car may have passed I am thus able to provide for the operation of the signal for a considerable time even though the circuitat the track is but momentarily affected. y

. In Fig. 4 I'have shown a slight modification in. the construction ofthe device to ada t it for use on a closed circuit, the teeth of t e ratchet bein reversely arranged and the lever 29'being thrown toward the left instead of theright and held in that position by the ratchet until the motor has rotated the ratchet shaft a predetermined distance. In other respects the operation of the device corresponds to the one described.

The fieriod of time during which the circuit wi be'closed through the. hollow rings may be regulated by means of suitable resistance in the armature circuit and by varying the length of the lever 29.

This device is capable of use Wherever it is desired toprovide means for keeping a signal circ'uit closed for a predetermined period after the circuit controlling the signal has been opened.

In Fig. 5 which illustrates the normal con dition of the parts, a conductor3l isconnected with a trolley wire through a sufficient number of lamps, not shown, to cut down the current to the required voltae for the bell and motor. In this position t e solenoid 32 is short circuited through the circuit closing ring 10 and the conductors 13 and 14. Contact points in the ring 10 are open as indicated, one of them being out of the mercury. The conductor 13 is connected to theconductor 31 and the conductor 14 leads to the conductor 14 from the ring 10. The solenoid 32 is inserted into the conductor 14 and has an armature 33 normally retracted by a spring 34. A circuit closing plate 35 is carried by the said armature and adapted to engage a terminal 36 connected with the conductor 31 and a terminal 37 that has a conductor 38 leading to the conductor 14.

When the circuit is closed'between the contact points of the ringl0 by the rotation of the said ring to the position indicated in Fig.

6, the current flowing in from the conductor 31 will pass through the mercury in the ring to the conductor 14' and fromthence through the solenoid to the conductor 13, the alarm bell, the motor and the ground G, causing the bell to ring and starting the motor. The energizing of the solenoid 32"will attract its armature- 33 and move the circuit closing plate 35 into engagement with the contacts 36 and 37. A new path for the current will be established throu h the conductor 31,

contacts 36 and3 7, ate 35, conductor 38, solenoid and conductor 13, to alarm bell,

motor and ground. The time element heretofore described will permit the circuit closing rings to rotate slowly, first o ening the contacts ofring 10. As there is 'a ready another ath provided for the circuit through the so enoidand its contact piece there will be no arcing of the current at the contacts of the ring 10 when the circuit is being 0 ened therethrough. When the: circuit 0 osers have rotated a sufficient distance the circuit between the contacts of ring 10 will be closed again-and'the solenoid will again be short circuited through the conductors 13 and 14. The solenoid will thereupon be de'e'nergized and the spring 34 will wlthdraw the circuit closin plate 35 and open the circuit through the be 1 and motor to the ground. The quick break at the contacts 36 and 37 will prevent arcing at those points and. as the circuit through ring 10 has already been brolgen no arcing will take place at-an point'iin the circuit. .,The operation 'describedfm'ay then bereeated.

I c aim as my invention 1. The combination, with a signal. circuit having a circuit closer comprising a hollow rocking ringcontaining a conducting agent and having terminals, of a relay circuit arranged when closed to o crate saidcircuit closer, and means for 100 g said closer to prevent opening of said signal circuit for a predetermined period after the opening of said relaycircuit. r .2. The combination, with a signal circuit having a circuit closer, of a relay circuit arranged when closed to o erate said circuit closer and means for loc ing said closer to prevent openingof said signal circuit and saidmeans operating step by step for a predetermined period after the opening of said relay circuit to release said closer and open said signal circuit.

3. The combination, with a signal circuit having a circuit closer comprising a hollow rocking body containing a conducting agent and having terminals, of a relay circuit arranged when closed to operate said circuit closer, a lever and arm connected with said circuit closer, a ratchet engaged by said arm and a motor geared to said ratchet, for the purpose specified;

4. The combination, with a signal circuit having a circuit closer comprising a hollow ring provided with contact points and containing a quantity of normally out of engagement with one of said points, arelay circuit arranged when closed to oscillate said ring and cause the mercury therein to engage both of said contact points, and

means for locking said ring to prevent its re turning" to its normal osition' for a pre'de '15 ed with sald ring, a counter weight normally opening of said re-I holding said armature away from the relaz magnet and themercury out of contact wit one of said points, and means for locking said ring when it is oscillated to -a position with the ,mercury therein in contact with both points andsaid means allowing said ring to return with a step by step movement to its normal position,.substantially as described.

6. The combination, with a signal circuit havinga circuit closer, of a relay circuit arranged when closed to operate said circuit closer, a ratchet,'an arm engaging the teeth of said ratchet and connected with said circuit closer, and a motor in saidsignal circuit I having a reduction ear connection with said ratchet, substan'tia y as described.

- 'Z. The combination, of a signal circuit having .a circuit closer comprising a hollow ring provided with contact points and con-, taining a quantityvolimercury, a shaft whereon said ring is mounted, a lever-provided on said shaft, a relay'circuit having a relay, an arm mounted on said shaft and; having a counter weight, a link connecting-said arm with the armature of said relay whereby said armature is normally held out of contact with its magnet and the circuit is brokenthrough the mercury in said ring, anfelectric motor in said signal circuit and IIIGBHSCOII- necting said-motor with said lever, 'whereby when said relay circuit is closed and said ring is oscillated it-will be prevented from returning for a predeterminedpe'riod to its normal position when said relay circuit is opened.

8. The combination, with a signal circuit having a circuit closerin circuit with a high tension current, of a secondary circuit 'connected with said signal circuit and adapted to form a second path for said current when the circuit -isrbeing broken at said closer, whereby arcing' between the circuit closer contact points will beprevented, substan-" tially as described. 2

9. The combination, with'a signal circuit having a circuit closer in circuit with aconductor provided with a suitable resistance the circuit is'being broken at said closer,

whereby arcing between the contact points of said circuit closer will be prevented;

10. The combination, with a signal circuit having aicircuit closer in circuit with a conleading to a trolley line, said circuit closer comprising a hollow ring of insulating material havingcontact points and containing a quantity of mercury, adapted to close the circuit between said oints, of a secondary circuit and means w ereby said secondary circuit will be closed and a second path established for the current when the circuit is closed atsaid closer. and said secondary circuit remaining closed while the circuit 1's'being broken at said closer,"whereby arcing between the points of said circuit closer Will be prevented. 1

1 1.-- The combination, with a signal circuit in circuit through suitable resistance with a trolley line, of circuit closers comprising hollow insulating rings containing mercury and provided with contact'points arranged to be immersed in the mercury, said signal circuit being connected with said, contact points, means for. rotating said rings, the circuit through one ring being opened while it is being closed through the other ring, a secondary circuit connected with said s1 nal' circuit and normally open, means forcosing said secondary clrcuit when the clrcult is closed between the contact points of one of said rings and said secondary circuit remaining closedwhile the contact isbeing broken in said ring, whereby arcing between the points.

of said ring will be prevented.

-12. The combination with a signal circuit having a circuit closer comprising a hollow rocking body containing a conducting agent and having terminals, of a relay circuit arranged to operate said circuit closer and means to prevent opening of said signal circuit for a predetermined period after openingof said relaycircuit.

13. The combination with a signal circuit having a circuit closer, of a relay circuit arranged to operate said circuit closer and means for locking said closer, said means operating step by step for a predetermined period to release said closer and open said signal circuit.

In witness whereof, I have hereunto set my hand this 20th day of April 1907.

EDWARD MC'OLINTOOK. Witnesses:

"RICHARD PAUL, J. B. ERA.

. ductor provided with suitable resistance and 

